docs: def update_counter(self, key, value, **kwargs):
          """
          Updates the value of a counter stored in this bucket. Positive
          values increment the counter, negative values decrement. See
          :meth:`RiakClient.update_counter()
          <riak.client.RiakClient.update_counter>` for options.
  
          .. deprecated:: 2.1.0 (Riak 2.0) Riak 1.4-style counters are
             deprecated in favor of the :class:`~riak.datatypes.Counter`
             datatype.
  
          :param key: the key of the counter
          :type key: string
          :param value: the amount to increment or decrement
          :type value: integer
          """
          return self._client.update_counter(self, key, value, **kwargs)